Wood’s Powr-Grip MT89AC - Manual (Page 12)

Rev 14.0/6-14 10 MT89AC: #35088
T
O
A
PPLY THE
P
ADS TO A
L
OAD
Generating Vacuum Flow
Place the power switch in the ON ( ) position. This engages the vacuum pump, causing
vacuum to be drawn immediately at the vacuum pads. 4
WARNING: Never turn power off during operation; keep pump running
throughout lift.
The lifter is designed for the vacuum pump to run continuously. Placing the power switch in the
OFF ( ) position during lifter operation could result in the release of the load and possible injury
to the operator (see T
O
L
IFT AND
M
OVE THE
L
OAD
: In Case of Power Failure to follow).
Positioning the Lifter on the Load
Make certain that the contact surfaces of the load and all vacuum pads are free of any
contaminates that could prevent the pads from sealing against the load (see MAINTENANCE:
V
ACUUM
P
AD
M
AINTENANCE
).
Center the lifter’s pad frame to within 2" [5 cm] of the load center, since off-center loading can
cause the load to tilt unexpectedly (see T
O
T
ILT THE
L
OAD
to follow), and it may also damage the
lifter. 5 Make sure that all vacuum pads will fit entirely on the load’s contact surface (see
SPECIFICATIONS: Pad Spread) and that they will be loaded evenly while lifting (see
SPECIFICATIONS: Per-Pad Load Capacity). Then apply the lifter to the load so that all pads seal
against the contact surface.
Note: If a vacuum pad has been lying against a hard object (as during shipping), it may be
slightly distorted. Although initially it may be difficult to apply the pad to a load, this condition
should correct itself with continued use.
WARNING: Do not disconnect control pendant during lifter operation.
The movable control pendant is not intended to be disconnected during lifter operation.
Disconnecting the control pendant is likely to result in a load release and injury to the operator or
others nearby.
4
If the vacuum pump or any other powered component fails to function while the power switch is in the ON position, make sure
the lifter is connected correctly to an appropriate power source, as directed in the ASSEMBLY section. If so, examine each circuit
breaker (adjacent to power switch) to determine whether it has interrupted the electrical circuit to the component. Although the
operator can reset the circuit breaker, the power interruption may indicate an electrical problem that requires attention. Correct
any deficiency before resuming normal operation of the lifter (see wiring diagram provided).
5
The lifter is designed to handle the maximum load weight (see SPECIFICATIONS: Maximum Load Capacity) when the load’s
center of gravity is positioned within 2" [5 cm] of the pad frame’s center point. Occasional loading deviations are permissible,
provided that the operator can maintain control of the load at all times and that the load weight is low enough to avoid damaging
the lifter.